ABB REQ650 1.3 IEC, Commissioning Manual

Page: 62 / 124

1. Set
RetripMode = No CBPos Check.
2. Apply the fault condition, including start of CCRBRF, without any current.
3. Verify that re-trip is achieved after set time
t1, and back-up trip after time t2.
4. Apply the fault condition, including start of CCRBRF, with current below set current value.
5. Verify that re-trip is achieved after set time
t1, but no back-up trip is obtained.
6. Disconnect AC and START input signals.
7.3.9.5 Verifying the back-up trip mode
M12104-146 v4
In the cases below it is assumed that FunctionMode = Current is selected.
Checking that back-up tripping is not achieved at normal CB tripping
M12104-150 v5
Use the actual tripping modes. The case below applies to re-trip with current check.
1. Apply the fault condition, including start of CCRBRF, with phase current well above set
value IP.
2. Interrupt the current, with a margin before back-up trip time,
t2. It may be made at issue
of re-trip command.
3. Check that re-trip is achieved, if selected, but no back-up trip is obtained.
4. Disconnect AC and START input signals.
The normal mode
BuTripMode = 1 out of 3 should have been verified in the tests above. In
applicable cases the modes
1 out of 4 and 2 out of 4 can be checked. Choose the mode below,
which corresponds to the actual case.
Checking the case
BuTripMode = 1 out of 4
M12104-165 v5
It is assumed that the earth-fault current setting
IN> is below phase current setting IP>.
1. Set
BuTripMode = 1 out of 4.
2. Apply the fault condition, including start of CCRBRF, with one-phase current below set
IP> but above IN>. The residual earth-fault should then be above set IN>.
3. Verify that back-up trip is achieved after set time. If selected, re-trip should also appear.
4. Disconnect AC and START input signals.
Checking the case BuTripMode = 2 out of 4
M12104-179 v6
The earth-fault current setting
IN> may be equal to or below phase-current setting IP>.
1. Set BuTripMode = 2 out of 4.
2. Apply the fault condition, including start of CCRBRF, with one-phase current above set
IP> and residual (earth fault) above set IN>.
3. Verify that back-up trip is achieved after set time. If selected, re-trip should also appear.
4. Apply the fault condition, including start of CCRBRF, with at least one-phase current
below set
IP> and residual (earth fault) above set IN>. The current may be arranged by
feeding three- (or two-) phase currents with equal phase angle (I0-component) below
IP>,
but of such value that the residual (earth fault) current (3I
0
) will be above set value
IN>.
5. Verify that back-up trip is not achieved.
6. Disconnect AC and START input signals.
7.3.9.6 Verifying the case
RetripMode = Contact
M12104-213 v7
It is assumed that re-trip without current check is selected, RetripMode = Contact.
1. Set FunctionMode = Contact
2. Apply input signal for CB closed to input CBCLDL1, CBCLD2 or CBCDL3.
3. Apply input signal, for start of CCRBRF.
Section 7 1MRK 505 293-UEN B
Testing functionality
56 Breaker protection REQ650
Commissioning manual
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